test: Add tests for various varlink socket units

Let's make sure these socket units work as expected by stopping the
related services and making sure the services are started as expected
when a client connects to the corresponding socket.

diff --git a/test/units/TEST-74-AUX-UTILS.varlinkctl.sh b/test/units/TEST-74-AUX-UTILS.varlinkctl.sh
index 2e0bf5f7d6aebad84b2a291a630daeb658fa0ba6..481dc85d6fd2f9cfefa5f3a434f4ca5d0bf65d5d 100755 (executable)
--- a/test/units/TEST-74-AUX-UTILS.varlinkctl.sh
+++ b/test/units/TEST-74-AUX-UTILS.varlinkctl.sh
@@ -66,6 +66,20 @@ if [[ -x /usr/lib/systemd/systemd-pcrextend ]]; then
     varlinkctl introspect /usr/lib/systemd/systemd-pcrextend
 fi
 
+# Test various varlink socket units to make sure that we can still connect to the varlink sockets even if the
+# services are currently stopped (or restarting).
+systemctl stop \
+    systemd-networkd.service \
+    systemd-hostnamed.service \
+    systemd-machined.service \
+    systemd-udevd.service
+varlinkctl introspect /run/systemd/netif/io.systemd.Network
+varlinkctl introspect /run/systemd/io.systemd.Hostname
+varlinkctl introspect /run/systemd/machine/io.systemd.Machine
+if ! systemd-detect-virt -qc; then
+    varlinkctl introspect /run/udev/io.systemd.Udev
+fi
+
 # SSH transport
 SSHBINDIR="$(mktemp -d)"